Lens: Power: 2.2x time conversion factor of your current lens setting. Optical System: Conversion type; mounts on front of existing lens. In this case a lens adapter is included, Mounting System: Screw type in front of existing camera lens into the filter accessory threads., Optics :Designed to maximize use day and night with coated optics to provide maximum image transmission with minimum distortion., Auto Focus: Utilizes camera auto focus system., Adaptability:Maintains all the camera functions plus it provides 2.2x telephoto lens conversion power. Accepts Filters. Includes lens cap, bottom cover, & pouch.